Malicious PDF — malware analysis report

Static analysis result for SHA-256 815058f6c026b15e…

MALICIOUS

PDF

39.8 KB Created: 2020-06-12 06:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fafdce67b8a7873cd4118e1f32dd690 SHA-1: 75eab1b3ca8a25c485f591fa882164e6b631c02c SHA-256: 815058f6c026b15e34c9b79390abfefa090d33dd370629523334ea8583b0043f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a coordinated effort to distribute content or manipulate search engine results. While no scripts were explicitly extracted, the PDF structure and the sheer volume of external links are highly suspicious and indicative of malicious intent, possibly to lead users to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://whisperandroar.org/uploads/1/3/0/7/130738997/130738997.html#rawlinsons+cost+guide
    • http://mybagsies.com/uploads/1/3/1/1/131164125/tedesufirixifotulojo.pdf
    • http://bronxfsczooinfo.com/uploads/1/3/1/4/131454415/kizuw.pdf
    • http://mail.enchantedlifebooks.com/uploads/1/3/1/6/131636736/kewulanixof.pdf
    • http://baltira.com/uploads/1/3/0/7/130740490/7185137.pdf
    • http://townesquaresalons.com/uploads/1/3/0/2/130288510/riwivefovale.pdf
    • http://cpcalendars.vishlestrange.com/uploads/1/3/0/5/130547340/tifobapize_pebamituba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ridarenujo.files.wordpress.com/2020/06/ruwifi.pdf
    • https://guremev.files.wordpress.com/2020/06/22348035811.pdf
    • https://xipiguver842418470.files.wordpress.com/2020/06/lemidemajiro.pdf
    • https://poginuwikola.files.wordpress.com/2020/06/wuler.pdf
    • https://pitekule.files.wordpress.com/2020/06/divunuzeboligafavafujix.pdf
    • https://fanekidug184676384.files.wordpress.com/2020/06/nonenuvikigixiladavedex.pdf
    • https://vusejiluvi.files.wordpress.com/2020/06/mujeporimiduwoteji.pdf
    • https://zunuxav.files.wordpress.com/2020/06/56196777286.pdf
    • https://mufumileroko.files.wordpress.com/2020/06/27090062442.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be7.bin
1d07700377baf32af75e619804635f97d6d4b33e0ae67528a038cdda1e73c35b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE7 10200 bytes
font_01_sfnt_off00007ed6.bin
fbb9b396285e804f0b6aa97f9cc0fc4ad384f688879e530a6409ce97cd6a24be
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED6 16268 bytes